Interrupt, error, and system messages
4.3 Diagnostics with STEP 7
IM151-1 HIGH FEATURE interface module (6ES7151-1BA02-0AB0)
Manual, 03/2008, A5E01075975-02
49
Bit Meaning Cause/Remedy
6 1: The DP slave type does not match the software
configuration.
• Has the correct station type been entered in the
configuration software?
7 1: Parameters have been assigned to the DP slave
by a different DP master (not the one that currently
has access to the DP slave).
• The bit is always 1, for example, if you access the DP
slave with the programming device or another DP master.
• The PROFIBUS address of the DP master that assigned
parameters to the DP slave is located in the "Master
PROFIBUS address" diagnostics byte.
Structure of station status 2 (byte 1)
Table 4- 4 Structure of station status 2 (byte 1)
Bit Meaning
0 1: The DP slave parameters need to be reassigned.
1 1: A diagnostics message is pending. The DP slave will not operate until the problem is
eliminated (static diagnostics message).
2 1: The bit on the DP slave is always "1".
3 1: The watchdog is activated for this DP slave.
4 1: The DP slave has received the "FREEZE" control command
1
.
5 1: The DP slave has received the "SYNC" control command
1
.
6 0: Bit is always "0".
7 1: The DP slave is disabled, that is, it has been removed from the processing in progress.
1
The bit is updated only if another diagnostics message changes also.
Structure of station status 3 (byte 2)
Table 4- 5 Structure of station status 3 (byte 2)
Bit Meaning
0 to 6 0: Bits are always set to "0".
7 1:
• There are more diagnostics messages pending than the DP slave is able to store.
• The DP master cannot enter all the diagnostics messages sent by the DP slave in
its diagnostics buffer (channel-specific diagnostics).
4.3.4 Master PROFIBUS address
Definition
The Master PROFIBUS address diagnostics byte contains the PROFIBUS address of the DP
master:
● That assigned parameters to the DP slave
● That has read and write access to the DP slave
The master PROFIBUS address is located in byte 3 of the slave diagnostics.
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